/**
 * Copyright 2009-2011 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.myjung.dao;

import java.util.List;

import net.myjung.model.QueryParameters;

/**
 * The super interface of all of DAOs.
 * 
 * @author Steve M. Jung
 */
public interface IDao {
	public static final String LEVEL_ALL = "all";
	public static final String LEVEL_FLAT = "flat";

	/**
	 * Executes SQL query
	 * 
	 * @param sql
	 *            The SQL query statement
	 * @param parameters
	 * @param resultClass
	 * @return
	 * @throws Exception
	 */
	public List<?> executeSqlQuery(String sql, QueryParameters parameters, Class<?> resultClass) throws Exception;

	public <T> T delete(T obj) throws Exception;
}
